{"station":{"icao":"KIAD","cliId":"IAD","pil":"CLIIAD","city":{"slug":"washington","name":"워싱턴 D.C.","country":"United States"},"timezone":"America/New_York","feed":"https://api.weather.gov/products/types/CLI/locations/IAD","html":"https://weathermarket.io/nws-cli/KIAD","json":"https://weathermarket.io/api/nws-cli/KIAD"},"stationToday":"2026-11-14","day":{"date":"2026-10-05","status":"issued","note":"Final CLI issued - values.nwsOfficial carries the official daily values (metric here; official.issued.asReported keeps the °F / inch / mph exactly as printed).","settlement":{"tmaxF":74,"tminF":56,"precipIn":0,"precipTrace":false,"tmax":23.33,"tmin":13.33,"precip":0,"issuedAt":"2026-10-06T06:29:00.000Z","productId":"iem:CDUS41-KLWX-060629:IAD:2026-10-05:final","corrected":false,"reissues":0,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIIAD&e=202610060629"},"issues":[{"kind":"interim","asOfLocal":"0500 PM","issuedAt":"2026-10-05T21:23:00.000Z","issuedLocal":"523 PM EDT MON OCT 05 2026","office":"KLWX","wmoHeader":"CDUS41 KLWX 052123","productId":"iem:CDUS41-KLWX-052123:IAD:2026-10-05:interim","source":"iem-afos","corrected":false,"tmaxF":74,"tmaxTimeLocal":"3:00 PM","tminF":57,"tminTimeLocal":"7:16 AM","precipIn":0,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIIAD&e=202610052123","parseProblems":[],"rawTextSha256":"3547f4f624db400fd0917febe4c06e04c22b173ffad8d46d38aab1dea861f337","rawText":"CDUS41 KLWX 052123\nCLIIAD\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC \n523 PM EDT MON OCT 05 2026\n\n...................................\n\n...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 5 2026...\nVALID TODAY AS OF 0500 PM LOCAL TIME.\n\nCLIMATE NORMAL PERIOD: 1991 TO 2020\nCLIMATE RECORD PERIOD: 1960 TO 2026\n\n\nWEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST \n VALUE (LST) VALUE VALUE FROM YEAR \n NORMAL \n...................................................................\nTEMPERATURE (F) \n TODAY \n MAXIMUM 74 3:00 PM 90 1967 72 2 82 \n 2013 \n MINIMUM 57 7:16 AM 32 1970 50 7 46 \n AVERAGE 66 61 5 64 \n\nPRECIPITATION (IN) \n TODAY 0.00 2.04 1971 0.12 -0.12 0.00 \n MONTH TO DATE 0.40 0.63 -0.23 0.00 \n SINCE SEP 1 4.20 4.57 -0.37 1.22 \n SINCE JAN 1 33.60 33.79 -0.19 25.86 \n\nSNOWFALL (IN) \n TODAY 0.0 MM MM 0.0 0.0 0.0 \n MONTH TO DATE 0.0 0.0 0.0 0.0 \n SINCE SEP 1 0.0 0.0 0.0 0.0 \n SINCE JUL 1 0.0 0.0 0.0 0.0 \n SNOW DEPTH 0 \n\nDEGREE DAYS \n HEATING \n TODAY 0 6 -6 1 \n MONTH TO DATE 5 25 -20 17 \n SINCE SEP 1 26 70 -44 24 \n SINCE JUL 1 26 71 -45 26 \n\n COOLING \n TODAY 1 2 -1 0 \n MONTH TO DATE 20 10 10 0 \n SINCE SEP 1 244 162 82 170 \n SINCE JAN 1 1524 1218 306 1318 \n...................................................................\n\n\nWIND (MPH) \n HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION W (290) \n HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION W (280) \n AVERAGE WIND SPEED 6.1 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.8 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED TODAY. \n FOG \n FOG W/VISIBILITY <= 1/4 MILE \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 100 12:00 AM \n LOWEST 37 4:00 PM \n AVERAGE 69 \n\n..........................................................\n\n\nTHE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 72 89 2013 \n MINIMUM TEMPERATURE (F) 49 28 1968 \n\n\nSUNRISE AND SUNSET \nOCTOBER 5 2026.......SUNRISE 7:10 AM EDT SUNSET 6:46 PM EDT \nOCTOBER 6 2026.......SUNRISE 7:11 AM EDT SUNSET 6:45 PM EDT \n\n\n- INDICATES NEGATIVE NUMBERS.\nR INDICATES RECORD WAS SET OR TIED.\nMM INDICATES DATA IS MISSING.\nT INDICATES TRACE AMOUNT.\n\n\n\n\n$$"},{"kind":"final","asOfLocal":null,"issuedAt":"2026-10-06T06:29:00.000Z","issuedLocal":"229 AM EDT TUE OCT 06 2026","office":"KLWX","wmoHeader":"CDUS41 KLWX 060629","productId":"iem:CDUS41-KLWX-060629:IAD:2026-10-05:final","source":"iem-afos","corrected":false,"tmaxF":74,"tmaxTimeLocal":"3:00 PM","tminF":56,"tminTimeLocal":"11:59 PM","precipIn":0,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIIAD&e=202610060629","parseProblems":[],"rawTextSha256":"ca1a1c21e5ed1154133fd5fa8bd257772b5a325c039c324cf25f7b15f62a2b39","rawText":"CDUS41 KLWX 060629\nCLIIAD\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC \n229 AM EDT TUE OCT 06 2026\n\n...................................\n\n...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 5 2026...\n\nCLIMATE NORMAL PERIOD: 1991 TO 2020\nCLIMATE RECORD PERIOD: 1960 TO 2026\n\n\nWEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST \n VALUE (LST) VALUE VALUE FROM YEAR \n NORMAL \n...................................................................\nTEMPERATURE (F) \n YESTERDAY \n MAXIMUM 74 3:00 PM 90 1967 72 2 82 \n 2013 \n MINIMUM 56 11:59 PM 32 1970 50 6 46 \n AVERAGE 65 61 4 64 \n\nPRECIPITATION (IN) \n YESTERDAY 0.00 2.04 1971 0.12 -0.12 0.00 \n MONTH TO DATE 0.40 0.63 -0.23 0.00 \n SINCE SEP 1 4.20 4.57 -0.37 1.22 \n SINCE JAN 1 33.60 33.79 -0.19 25.86 \n\nSNOWFALL (IN) \n YESTERDAY 0.0 MM MM 0.0 0.0 0.0 \n MONTH TO DATE 0.0 0.0 0.0 0.0 \n SINCE SEP 1 0.0 0.0 0.0 0.0 \n SINCE JUL 1 0.0 0.0 0.0 0.0 \n SNOW DEPTH MM \n\nDEGREE DAYS \n HEATING \n YESTERDAY 0 6 -6 1 \n MONTH TO DATE 5 25 -20 17 \n SINCE SEP 1 26 70 -44 24 \n SINCE JUL 1 26 71 -45 26 \n\n COOLING \n YESTERDAY 0 2 -2 0 \n MONTH TO DATE 19 10 9 0 \n SINCE SEP 1 243 162 81 170 \n SINCE JAN 1 1523 1218 305 1318 \n...................................................................\n\n\nWIND (MPH) \n HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION W (290) \n HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION W (280) \n AVERAGE WIND SPEED 6.8 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.6 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED YESTERDAY. \n FOG \n FOG W/VISIBILITY <= 1/4 MILE \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 100 12:00 AM \n LOWEST 36 5:00 PM \n AVERAGE 68 \n\n..........................................................\n\n\nTHE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 72 89 2013 \n MINIMUM TEMPERATURE (F) 49 28 1968 \n\n\nSUNRISE AND SUNSET \nOCTOBER 6 2026.......SUNRISE 7:11 AM EDT SUNSET 6:45 PM EDT \nOCTOBER 7 2026.......SUNRISE 7:11 AM EDT SUNSET 6:43 PM EDT \n\n\n- INDICATES NEGATIVE NUMBERS.\nR INDICATES RECORD WAS SET OR TIED.\nMM INDICATES DATA IS MISSING.\nT INDICATES TRACE AMOUNT.\n\n\n\n\n$$"}],"html":"https://weathermarket.io/nws-cli/KIAD/2026-10-05","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-05"},"about":{"product":"NWS Climatological Report (CLI): the daily climate summary issued by the local NWS forecast office from the station's 1-minute ASOS record, normally 1-3 hours after local midnight (final, 'YESTERDAY') and once during the day (interim, 'TODAY AS OF'). Corrections are re-issued under the same PIL with CORRECTED in the text.","settlementRule":"The settlement value for a date is the latest final CLI issued for that date; a corrected re-issue supersedes earlier issues. Interim same-day products never settle. This is the same rule that fills values.nwsOfficial in /api/station/{icao}/daily.","archive":"Every issue is stored verbatim as received - nothing is edited or re-derived. Products are held from 2026-09-01 (backfilled from the IEM AFOS archive) and ingested live from api.weather.gov since 2026-11-10, polled every 30 minutes. A date with no final CLI 14 hours after local midnight is reported as not_issued rather than filled in.","verify":["Each issue carries the NWS product id (api.weather.gov keeps products for a limited time) and a link to the IEM AFOS permanent archive of the same product.","rawTextSha256 is the SHA-256 of the stored product text; compare it with the text at either link to confirm nothing was altered.","Permalink pattern for market rules: https://weathermarket.io/nws-cli/KIAD/YYYY-MM-DD (HTML) and https://weathermarket.io/api/nws-cli/KIAD/YYYY-MM-DD (JSON)."],"citation":"Settlement source: the final NWS Climatological Report (CLI) for station KIAD for the contract date, as archived verbatim at https://weathermarket.io/nws-cli/KIAD/YYYY-MM-DD with links to the NWS product and the IEM archive. A CORRECTED re-issue published before the settlement time supersedes earlier issues."}}